I think that is the issue, right?
I mean, if anyone at all thinks it looks/sounds/smells like celebrating or looking at it as a positive, that is the problem.
Dude could have totally just said "What happend to the CEO if f#&%ing horrible and I hope the dude that killed him is hunted down and executed, like all killers should be. I also feel so bad for people that pay their insurance and get denied coverage".
How is that hard? Nothing there to overthink, right? But he clearly and carefully picked his words and he picked them for a reason. I don't blame him at all, it got him clicks and probably followers. Good for him. But he knew what he was doing.